Alaska Boring Logs & Geotechnical Data
7,991 public boring logs in Alaska; 7,662 with digitized SPT, soil or CPT data; 329 scanned log PDFs. Sources include Alaska Division of Geological & Geophysical Surveys, plus public reports found by web crawl. Free to search on the map, download or query by API.
Where the data comes from
Web-crawled reports in Alaska were published on, among others: dot.alaska.gov, matsugov.us, dec.alaska.gov, dggs.alaska.gov, commerce.alaska.gov, dnr.alaska.gov.
Counties with the most boring logs
| County | Boring logs | |
|---|---|---|
| Anchorage | 3,760 | view on map |
| Matanuska-Susitna | 2,292 | view on map |
| Kenai Peninsula | 408 | view on map |
| Yukon-Koyukuk | 345 | view on map |
| Nome | 197 | view on map |
| Northwest Arctic | 188 | view on map |
| Bethel | 141 | view on map |
| Fairbanks North Star | 96 | view on map |
| Denali | 89 | view on map |
| Hoonah-Angoon | 79 | view on map |
| Dillingham | 65 | view on map |
| Kodiak Island | 64 | view on map |
What's in a boring log from Alaska
The 7,662 digitized borings carry the data engineers actually use: SPT blow counts (N-values) by depth, soil and rock descriptions, groundwater observations and, where the source ran cone penetration tests, CPT tip resistance and sleeve friction. A further 329 logs are scanned PDF reports — the original agency drawings — which you can open and download from the map. Holes are typically about 72 ft (22 m) deep; one in twenty goes past 298 ft (91 m). Not sure what a boring log looks like? See annotated example boring logs.
How to get this data
- Map — pan to a site, click a boring, and view the log, the original PDF, or an ML soil-profile prediction. No account needed.
- Downloads — every boring exports as PDF, DIGGS XML or AGS4; draw a polygon on the map for a multi-boring export or a site report.
- API — query borings by coordinates or bounding box, pull SPT/CPT/lab records, and generate site reports programmatically.
- Contribute — have Alaska boring logs that are not here yet? We take PDFs, DIGGS, AGS and spreadsheets.
This data was collected from public agencies and is republished as-is. It is a planning tool, not a substitute for a site investigation; see the terms and disclaimer. Counts refreshed 2 November 2026.
Other places
Washington (186,877)Florida (171,716)Ohio (80,944)California (75,283)Oregon (71,862)North Carolina (70,533) all regions →